You can add this serum to your routine only after reaching AVST 3 or C-Quence 3 and allowing your skin to fully adjust to that level. Lightweight and fast-absorbing, this Environ Tri-Retinoid Complex Retinol Serum promotes healthier-looking skin, the tri-retinoid complex-infused formula enhancing skin resilience, improving the appearance of photo-aged skin, and blemish-prone skin. Perfect for introducing as part of your skincare routine once your skin is comfortable with medium levels of vitamin A, this serum balances your complexion and smooths fine lines and wrinkles, rejuvenating your complexion, to leave it fresh, bright, and healthy.